With most of the top contenders struggling down the stretch, Brett Wetterich grabbed a one-shot lead after the third round of the Deutsche Bank Championship on Sunday.

Shooting his best round since the end of June, Wetterich carded a five-under 66 and sits at 13-under 203.  He is one shot ahead of Arron Oberholser, who also signed for a 66 to move to 12-under 204.

Wetterich, whose only PGA Tour victory came at the Byron Nelson Classic in 2006, eagled the par-five seventh hole to take the lead and maintained it despite missing a pair of short putts at numbers 16 and 18.

Tiger Woods had an uncharacteristic late stumble, three-putting the final two holes, to finish with a 67 in the second event of the inaugural FedEx Cup playoff series.

Woods is three shots off the lead at 203.

Phil Mickelson failed to take advantage of a couple of spectacular shots but he regrouped to birdie the 18th to finish with a 68 and move into sole possession of third place, two strokes back of Wetterich.

England's Luke Donald carded his worst round of the tournament so far as he made five bogeys and just three birdies for a 73 and drop down the leaderboard to tied 49th.

Woods appeared ready to assume control of the tournament midway through Sunday's round.

After an opening-round 72 left him nine shots off the lead, the world's number one player rebounded with a seven-under-par 64 on Saturday to get in contention and continued his move up the leaderboard in the third round.

Woods carded a birdie at number two and added three in a row at number eight, nine and 10 to forge a tie with second-round co-leader Aaron Baddeley and Wetterich at 10-under.

Another birdie at number 12 got Woods within a shot of Wetterich, but he suffered a three-putt bogey on the 17th and had to settle for a par on the par-five 18th after another three-putt.

Mickelson almost holed out from the fairway from the 14th hole but missed a short birdie putt, then hit the flagstick from the fairway on the 15th, only to watch the ball careen off the green.

After carding 10 straight pars, Mickelson hit a beautiful approach shot on 18 and converted the short putt for a birdie.

He will be paired with Woods on Sunday for the third time in this event.

Baddeley also staggered at the end with bogeys on number 16 and 18 to finish at one-under 71 and in a tie with Woods at 203.

Rich Beem and Mike Weir, who also held a share of the lead after two round, both struggled.

Beem birdied two of the last three holes for a 73 to drop him six shots back at 206.

Canadian Weir bogeyed number 16 and 17 for a 74 and tumbled to six-under 207.